Chapter 236 Flight
Li Ang dipped some dew from the weeds on his thumb, and raised his thumb to face the morning wind, feeling the wind speed, wind direction, temperature, humidity and other factors.
Everything fits.
He turned his head to look at Yu Feiyu, and said with a smile: "The special envoy can check this aircraft to make sure that no silk or talisman is used on it."
Yu Feiyu frowned slightly, stepped forward half a step, released his spiritual consciousness, and glanced at the "gong" shaped aircraft.
Indeed, as Li Ang said, the metal wires, masts, propellers, transmissions, etc. on the aircraft are all made of ordinary metal and light wood boards, which are not the best carrier of thoughts.
As for the skin of the aircraft
"Is this the skin of a civet rabbit?"
Yu Feiyu asked.
"It's paper made from civet rabbit skin."
Su Feng nodded and said: "Peel off a layer of rabbit skin and take out five pieces, tan them, dry them in the shade, soak them in water and crush them, and fuse them with the fibers of red bamboo to make a whole piece."
Bian Chenpei's eyes lit up, and he said immediately: "The raccoon rabbit is a fourth-class monster. The material made of its skin is naturally alienated, and it is considered a contraband!"
"I'm afraid not."
Su Feng glanced at him, and said indifferently: "The civet rabbit paper is very light in weight and extremely strong in toughness, it won't break when it's torn, and it won't rot when exposed to water.
It can be used as a high-quality leather armor lining, and it can also be used as paper to record important information.
For three years, what our school re-tested was the Rabbit paper.
It is already a common item in Yu State, and a part of it will be provided to Taihao Mountain every year—in the books and classics carried by the envoys, there may be paper made of raccoon skin. "
“.”
was put together.
Bian Chenpei's face turned ugly again.
Taihao Mountain gathers the resources of the whole world, and the food and clothing of the students are more "luxury" than the ordinary royal children, and they don't care about the daily necessities at hand at all.
If he said that the raccoon rabbit skin paper was a contraband, how would he explain it if the academy found related items from them?
You can’t sacrifice wine in front of the academy, or in front of foreign students,
It is said that the contraband in the Academy is a contraband, but the contraband in Taihaoshan is not counted, right?
"If there are no problems, then I will start."
Li Ang smiled slightly, opened the leather door of the cockpit, and sat on the seat.
It is said to be a cabin, but it is actually very reluctant.
There is not much redundancy in the narrow space, and the chainrings and chains are exposed. You need to be extra careful when stepping on the pedals to prevent scratches and scratches.
In the eyes of outsiders, this aircraft looks weird and simple, but in Li Ang's eyes, every part of this aircraft is the crystallization of human wisdom.
It has a very beautiful name in the memory of the foreign world—Gossamer Albatross.
It was designed and manufactured by American aeronautical engineer Mike Credy. It is driven by human muscle power to fly gears, chains and propellers.
And on June 12, 1979, driven by Brian Allen, it took 2 hours and 49 minutes to fly 37 kilometers across the sea and fly over the entire English Channel.
Various information flashed through Li Ang’s mind, he looked out through the cockpit skin,
I saw the surrounding people scattered under Su Feng's command, and cleared a runway in the open woodland.
All eyes were on this weird aircraft and Li Ang in the cockpit.
"Can this fly?"
"And it's made of wood, won't it really fall apart in half?"
The sound of the surrounding discussion is carried into the ears with the breeze,
Li Ang smiled slightly, looked back, put his hands on the handle, and stepped on the pedal slowly.
The high-precision transmission device manufactured by Tantai Leshan himself has no harsh metal friction sound. The pedal drives the crankset, and the drive flywheel rotates from slow to fast.
The chains are flowing at high speed, driving the propeller blades at the rear of the aircraft to rotate slowly.
The propeller blades generate wind force, pushing the aircraft forward slowly and accelerating.
The pulley under the cockpit rotates across the lawn until it breaks away from the ground.
Amid unbelievable gazes, the aircraft left the ground,
The huge horizontal wings are shrouded in the morning light, like the wings of a giant beast, casting shadows.
"It actually, really, flew up."
Students from all over the world subconsciously opened their mouths wide,
Yu Feiyu's eyes narrowed slightly, and his profound spiritual sense that didn't match his age swept towards the sky, covering the aircraft.
There is no mind power, no talismans, not even the slightest wave of aura.
This aircraft, as Li Ang said, is driven purely by human power to complete the flight.
"How can it be"
Bian Chenpei's face was livid, and he muttered to himself,
Ordinary people find it difficult to lift heavy objects that are as heavy as themselves.
And with such an aircraft, can it break away from the **** of the earth?
"nothing is impossible,"
Ou Zhiyuan looked at the aircraft and said with emotion: "Do you remember the lift formula that you abandoned like a shoe?
Lift is equal to the lift coefficient, multiplied by one-half, multiplied by speed multiplied by itself, multiplied by air density, multiplied by wing area.
Because it is driven by manpower, the speed cannot be very fast. In order to increase the lift,
Only optimize the lift coefficient of the wing and increase the wing area.
The wings of this aircraft are specially designed, the lift coefficient can reach 3/2, and the lift-to-drag ratio exceeds forty.
Because the material is extremely light, the total weight is only about 50 catties, which is only 150 catties including Risheng.
The load on the average area of the wing is extremely low, even if it flies slowly at an extremely low speed of 30 miles per hour, it will not stall.
Ordinary manpower, substituted into the propeller power, rotational speed, pulling force, and speed formula, can fully meet the minimum speed for the aircraft to keep flying. "
Accompanied by Ou Zhiyuan's words, Li Ang drove the aircraft twice in the sky, drew a "8"-shaped trajectory, and landed slowly.
“Confucianism is a science that studies the principles of the universe and everything on earth.”
He pushed open the cockpit door and said: "Air, water, vegetation, land. Everything has its law.
It is true that the speed of this aircraft is far inferior to running fast, and the load capacity is far inferior to that of a carriage. As for the defensive performance and maneuverability, it is far behind Feijian.
But its existence proves one point—human wisdom is the most precious wealth.
In the past, the privilege of flying in the sky was considered to be only owned by birds and a few monks, but now it can be owned by any mortal.
This is the charm of Neo Confucianism. "
Li Ang smiled, glanced at Bian Chenpei and other Taihao Mountain disciples with ugly faces, and said: "To prove once again, I didn't use any means of reading or talisman just now,
I wonder if there are any volunteers who are willing to try to fly this aircraft? "
(end of this chapter)